I/O Shield For ASUS PRIME B550-PLUS Motherboard Backplate IO | eBay
Supermicro MCP-260-00067-0N IO Shield For Motherboard and 2U+ Chassis
I/o Io Shield For Msi X470 Gaming Pro /x470 Gaming Plus Motherboard Backplate - Pc Hardware Cables & Adapters - AliExpress
How to Install Motherboard in Case (Step by Step Photos)
Generic ATX Motherboard Back IO Vented Shield Back Panel Plate Cover - MODDIY
In case you're wondering, the plastic IO cover/shroud is removable on the GIGABYTE GA-AX370-Gaming K7 (and probably also on the gaming 5). This is what's beneath. : r/Amd
Motherboard I/O Cover | 3D CAD Model Library | GrabCAD
3D Printed IO, 24pin and PCI slot cover - Cases and Mods - Linus Tech Tips
illuminated io shield - Edge Up
Motherboard I/O Cover | 3D CAD Model Library | GrabCAD
How To Install IO Shield On Your PC Chassis? (Step-By-Step Guide